Why is the brake light on the dashboard always on?

[Ana]

The brake light on the dashboard staying illuminated is generally caused by a low brake fluid level in the reservoir, indicating that the vehicle is lacking brake fluid, which should be replenished promptly. Typically, there is a sensor inside the brake fluid reservoir. When the brake fluid level drops, the warning light will illuminate to alert the driver of a potential brake system issue. If there is no brake fluid leakage or the fluid level has only slightly decreased, it suggests that the braking performance remains good, but regular checks of the brake fluid level are still necessary. A drop in brake fluid level should be addressed by timely replenishment. If the brake fluid is being consumed rapidly, it is advisable to inspect components such as the brake lines, brake calipers, and brake hoses for potential leaks, which should be repaired immediately if found. Additionally, if pressing the brake pedal results in an excessively long braking distance or occasional brake failure, the vehicle should not be driven further under such conditions.